Shock-absorber.



J. A. MGKNIGHT.

SHOCK ABSORBER. APPLICATION FILED APR. 8, 1914.

1,104,064, Patented July 21, 1914.

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WW ywwm J! L MGKNIGHT. I I SHOCK ABSORBER. APPLICATION FILED APB-B,1914.

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INVENTOR.

end. a sleeve 50351}! A. MQKNIGET, Q3:

iiiiiiiili LQUISVILLE, KENTUGKY, $6. .AzCOB-PORATIGN KENTUCKY.

ASSIGNGR T THE IiZlLLEJITISlvZIFG.

. SHo'CK-ABSDH'BER;

kipp'iication filed. April 8, 191%. Serial No. 830

Specification of Letters Patent.

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certain new and useful improvements in Smock-Absorbers, of which thefollowing 1s a. scecii'icntion;

ran it ction 0E springs positioned between the and axis of a. vehieisl.

An obgect is toproi-ide a device in which tance to the action of thesprings 12;

i by graduated steps. imotueroh act is the PZ'O'QTISIOH of a device 3not. destroy the eiiiciency thereof. I object is-to provide a. device ofzicier described that n iii be economimi 1 construction and eiiicient inservice.

iththe' foregoing and other OiijQCtS in the invention consists of novelc0n-' motion and arrangement of parts illusted in'the accompanyingdrawings, comng ihree sheets, -which form a partof specification, inwhich. is set forth an :2; wdimont of the invention, but it is to benncierst'ood that changes, variations and nodifications'niay beresoiized to that come LZ'li'i'lifl the scope of the appended claims.

, .a the drawings, in which like reference 9 several views; Figure 1, isanelcvution 1 invention as applied for service; Fig.

the is. side alteration; Fig. 3, a plan View, with cap removed and thearm broken away; i. a plin of the inner side of the cap, with an armbroken away; Figs. and 6, modifications respectiiely of 3 and i; 7,3section'oniine of Fig. 1; :5-

8, a perspective o'fithe inner brake shoe; 9, a perspective of the outerbrake shoe ig. 10, a perspective of the intermediate member; Fig. 11, aperspective of the cap.

Referring to the drawings -1-- designates a cupped-shaped casing fromthe ,periphery of which extend an arm. -2, pro

'vicieci on its outer end with a sleeve 3--,.,

ihr-ough' whicha bolt may be passed for the pnrp os f attachment toamovable part of the v is, A. cap, .or cover -5' has an aunt, extendingfrom the periphery thereof, a i

son and State of Kentucky, have invented his invention relates toimprovements in devices for-minimizing the shock due to the i which theWearing of the friction elements characters designate correspondingparts in i I in having on its outer 1 through which a 130% may he passedfor attachment to port of vehicle. The arms and 6 may he sectional, asshown in Figs. Land or integral as shown in Fig. ii. The cap 5 his overthe casing 1, seating on an exterior, annular seat -8, in such mannerthat Host and. moisture will be excluded from the interior of thecasing, while permitting free relative rotary IDOYQIX'IQllt of the twoparts. The casing has a =central appcrture '-9 through which passes a.screw threaded hoit -10- that engages in :1 ing --1l-,in te ral with andextending in vfrom the cap, the bolt being pro vioeci with a lock-nutl:2- that prevents the bolt from becoming loose from vivrntion. The bolt16 holds the in position on the casing. The lug 11 has lateral e321-tensions, or Wings -13 on which is disposed :1 layer of suitablesonnalwleatiening innierini -lai. such as leather, that may be securedin piece any suitable means, such as rivets An intermediate member -16-,the casing 1,1135 and lateral slots a central perforation 1 7 0n theexterior of tlie'intermedime member areleternl cxtens1o11s,or wings,--19, which extend to the Wails of the The Wings 13 lie within theslots 18, anti are of less thickness than the Width of the sio'ts,

the arrangement being such. that the cap 5 may have a limited movementrelative to the casing 1 before the Wings strike the sides of the slots,and advance the intermediate memher. I

Concave-convex brake shoes --2() beer on opposite sides oftheintermetlizi'te member 16, and offer frictional resistance to itsmovernient, during a portion ofits travel. A pair of concavo convexbrake shoes '21,Ihav

ing inward extensi0ns'.22- on each end thereof, bear against theinnersurface of the walls of the casing 1. A plurality of springs 23-.positioned between, and bearing on the inner and outer brake shoesserve. to

centrally positioned Within -l8-, radiating therefrom, for the receptionof the lug 11 and. associated w1ngs 13.

in the same radial line. as shown in Fig. 5.

force the shoes respectively against the termediate member and the wallof the easing and resist the relative movement thereof. The relativelymovable parts '1. and 5 may be attached to relatively movable parts ofthe vehicle by suitable 111eans,sucli as the.

. merits demand.

'vance them simultaneously.

In Fig. 3, the position'of the different members is that assumed whenthe vehicle, towhich the absorber attached, is travel-. ing under normalconditions over a smooth surface. The space between the wings 13 and thesides of the slots 18 is arranged to allow of a limited movement of thebody of the vehicle relative to the axle with out bringing resistanceoffered by the brake shoes into service. Vhen the body approaches theaxle a distance tobring the wings 13 into contact with the walls of theslots in the intermediate member, said member will be carried therewithagainst the friction of the brake shoes 20: when the distance traveledis suilicient to bring the arms 19 against the extensions 22 on theouterbrake shoes, the movement of the intermediate member relative tothe inner shoes will cease, and said member will advance the outershoes, and the additional resistance due to the larger area offrictional contact of the outer brake shoes will be offered to themovement of the body. I It is to be observed that the initial movementof the intermediate member is opposed by the inner brake shoes, but thatowing to'the greater area of frictional contact the outer brake shoes donot move therewith. After a predetermined extent of travel the arms 19,on the intermediate member impinge on the extension 22 of the outerbrake shoes and ad- As the intermediate member picks up the outer brakeshoes, the movement thereof relative to the inner shoes ceases and theadded resistance to torque is the difference between the frictional areaof the inner and outer brake shoes. In Fig. 5, is illustrated amodification wherein only one inner and one outer brake shoe isemployed, they being nearly circular, instead of arcuate, on therebound, or movement of the body from the axle, the sequence of actionsis the same, but in the reverse direction. It is thought that themanifold advantages, and operation of the invention may be clearlyunderstood from the foregoing Without more extended description. 1

1 Having thus described the invention so that anyone skilled in the artpertainingthereto may, make and use the same, I c la1m;

l. A shock absorber comprising a casing, a cover therefor, anintermediate member' engaged by said cover, friction members be tweensaid intermediate memberandsaid casing, said cover adapted to advancesaid therefor, an intermediate member positioned in said casing'a lugon'said cover adapted to engage said member, a brake shoe ems bracing amajor portion of said member, a brake member in contact with a majorportion of the wall of said casing, springs'pd sitloned between saidshoes. a pro ection on said intermediate member adapted to engage theshoe in contact with casing wall.

3. In a shock absorber, a casing, a cover for said casing, anintermediate member engageable by said cover,a plurality of frictioncouples disposed between said'intermediate member and said casing, saidcouples comprising inner and outer members, springs between said membersforcing same respectively against said casing and intermediate member,projections on said intermediate member adapted .to engage said membersand advance same simultaneously.

.4. In a shock absorber, a casing, a cover rotatabl-y seated on saidcasing,an intermediate member positioned in said casing, a lug on saidcover entering said member, a bolt passing through said casing andengaged in said lug. a projection on said lug adapted to engage saidmember,- a brake shoe in contact with said member, a brake shoe incontactwith the wall of-said casing and a projection on said memberadapted to engage said second mentioned brake shoe and advance same.

5/In a shock absorber, a casing anda cover, said casing and coverrelatively rotatable, a bolt connecting said casing'and cover, anintermediate member within said casing, means associated with thecovenfor engaging said member. brake shoesi'ncontact with said member,brake shoescontacting with the wall of said casing, means'ass ociatedwith said member for simultaneously engaging said second mentioned brakeshoes.

6, In a shock absorber,-'a'ca'sing and a cover therefor rotatably'.associated, arms extending from'the periphery of each thereof, anintermediate member positioned within said casing, a plurality of innerbrake shoes bearing on said member, a plurality of outer brakeshoes'bearing against the wall of the casing, springs positioned betweenCIT said brake shoes, a lug on said cover adapted to engage and advancethe intermediate member relative to said; brake shoes, and a projectionon said intermediate member adapted to simultaneously engage and advancesaid outer brake shoes.

7. in ashock absorber, an open ended casing,'en arm extending from theperiphery thereof, a cover rotatably secured on said casing, an armextending from the periphery of said cover, an intermediate mem oerwithin the casing, a lug on said cover adapted to advance said member,inner and outer brake shoes bearing respectively on said member and theWall of said casing, springs between said inner and outer shoes,

a projection on said member adapted to ad- Yancethe outer brake shoessimultaneously.

and outer brake shoes bearing respectively on said member and the Wallof the casing and an arm on said member adapted to advance the outerbrake shoes simultaneously.

JOHN A. MOKNIGHT. Witnesses F. H. KAPPA, W. B. MUNNELL.

